Diagnosis System

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

DESCRIPTION
When a system error is detected, the LEXUS Link system informs the driver of the error by illuminating the red LED on the mayday switch assembly.

If the red LED is malfunctioning, the following voice warning is provided:

"A system error has been detected. Please contact your LEXUS dealer."
CHECK BLINKING PATTERN (FAST 1)
1. Check current DTC (See DTC CHECK/CLEAR ).
Fig 1: Identifying Blinking Pattern Of LED (Fast 1)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the blinking pattern is the same, there is no problem.

HINT:

This blinking pattern is output when both of the following conditions are met: 1) there is a LEXUS Link service subscription, and 2) in data mode, there are no current or historic DTCs.
CHECK BLINKING PATTERN (FAST 2)
1. Check current DTC (See DTC CHECK/CLEAR ).
Fig 2: Identifying Blinking Pattern Of LED (Fast 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the blinking pattern is the same, a historic DTC exists.

Perform repairs according to DIAGNOSTIC TROUBLE CODE TABLE .

HINT:

This blinking pattern is output when both of the following conditions are met: 1) there is a LEXUS Link service subscription, and 2) in data mode, there is no current DTC but there is a historic DTC.